Tsurumi Pump LB-250, Руководство по эксплуатации

Страница: 27 / 32

-10-
Operation
WARNING
The pump unit may be extremely hot during operation. To prevent burns, do
not touch the pump unit with bare hands during or after the operation.
Pay attention to the water level during the pump operation. The pump may become dam-
aged if it is allowed to operate dry.
Due to an overload operation or a pump malfunction, if the motor protector trips to stop
the pump, make sure to eliminate the cause of the problem before restarting.
To operate a submersible pump (including automatic operation), set the water level so that
the pump will operate about 10 times per hour.
Note:
A large amount of amperage flows when a submergible pump is started, causing the tem-
perature of its windings to rise rapidly. Beware that a frequent stop-and-go operation of
the pump will accelerate the deterioration of the insulation of the motor windings and thus
affect the use life of the motor.
Operating Water Level
CAUTION
Do not operate the pump below the C.W.L.
(Continuous Running Water Level) indicated
below. Failure to observe this condition may
result in damage to the pump, electrical leakage
or electrical shock.
C.W.L.
Pump Model C.W.L.
(mm)
LB(T)-1500 80
(3) Connect the pump to the pipe and submerge it in water.
(4) Operate the pump for a short time (3 to 10 minutes) and perform the following checks:
Using an AC ammeter (clamp), measure the operating current at
the phases U, V, and W that are connected to the terminal board.
COUNTERMEASURE
Because an overload condition may be present at the pump motor if the
operating current exceeds the rated current, follow the instructions in
section "4. Installation" to operate the pump in the correct manner.
Using an AC voltmeter (tester), measure the voltage at the terminal board.
Power supply voltage variation = within ± 10% of the rated voltage
COUNTERMEASURE
If the power supply voltage deviates from the variation value, the cause
of the deviation may be the capacity of the power supply or the extension
cable that is used. Refer to section "5. Electrical Wiring" to operate the
pump in the correct manner.
CAUTION
In case the pump exhibits an abnormal condition (such as a considerable
amount of vibration, noise, or smell), disconnect the power supply
immediately and contact the dealer where you purchased the equipment, or
Tsurumi's sales office in your area. If the pump continues to be used in the
abnormal state, it may cause current leakage, electrical shock, or fire.
(5) Proceed with the normal operation if no abnormal conditions are found during the trial
operation.
U V W G
Ground
V
U V
G W
Ground